Right speaker and right headphone are not working

sanny16

Journeyman
The left speaker and the woofer of altec lansing audio system is working fine but the right speaker is not at all working. I tried to hear the audio on the logitech headphone , observed the same problem. Left one is working fine in both cases. Is it a pc hardware problem?

Could this problem be related to my sound hardware on the motherboard? Because there is always a disturbance in sound whether there is any audio playing or not. I am using GA B75 D3h.
 
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